similar to: Inheritance design question

I''ve been searching the web, wikis, and more, and I haven''t turned up examples of how to have multiple entities in a single-table inheritance related to anything. I have an addresses table, but multiple entities can have Addresses: both Person (which has 2 addresses) and Retailer. I''ve been told that I need to use single-table inheritance, and this was my attempt:

Hey guys, I just implemented very simple and primitive class table inheritance in ActiveRecord. The goal is for this to become mature enough to become a true feature in Rails. Check it out here: http://guest@blog.raylucke.com/svn/inherits_from Here?s how it looks in action: create_table "books", :force => true do |t| t.column "product_id", :integer t.column

I posted something about this a week ago wihtout response, but have made some progress since. However, I''m still not getting exactly what I want. OK, three core tables: create_table :reference_items do |t| t.column :title, :string, :limit => 255 t.column :year, :integer, :limit => 4 t.column :type, :string t.column

I''m looking to implement model inheritance in a new application. Is there any good alternative to single-table-inheritance? -- -Alder

Hello, is it possible to setup a model/table schema like this: Groupable --> Membership <-- Group ^ ^ | | User UserGroup I tried the following but failed: Groupable (table with ''type'' column) has_many :memberships, :as => :groupable has_many :groups, :through => :memberships

I have two models, Article and Post, that has many Comments. However, both Article and Post are inherited from a BaseContent class like so: class Article < BaseContent has_many :comments, :as => :commentable end class Post < BaseContent has_many :comments, :as => :commentable end and here''s my Comment model: class Comment < ActiveRecord::Base belongs_to

Hi, currently I do some work with polymorphic associations in egde rails class Order < ActiveRecord::Base belongs_to :payment, :polymorphic => true end class CreditCardPayment < Payment end class PayPalPayment < Payment end class Payment < ActiveRecord::Base has_one :order, :as => :payment # common stuff in here end I want to use [Payment] for common functionality

I am trying to create a generic person model. Then subclass it as either a professor or an author. The only problem is that since some professors are authors, I don''t want duplicate entries. Any ideas on how to handle this? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk"

I am using RoR ActiveRecord polymorphic inheritance and was wondering if it''s possible to access the base class'' association methods in the invocation of either to_xml or to_json without having to depict the base class data in the serialized string. Here are my classes: # base class class Asset < ActiveRecord::Base belongs_to :resource, :polymorphic => true

Hi ! VIRTUA TENNIS works fine (very fine and better than Cedega) , except sound (problem with initialising DirectXAudio. Error code : 0x88780078) and the game screen don't fit the desktop or fullscreen resolution: his parent window seems not be able to re-size itself. A screenshot here : www.ayuka.fr/tmp/CaptureVirtuaTennis.png and here (Desktop mode) :

I realize this subject is redundant for this community, but I''m hoping the Rails community can provide me with some additional ammunition to help push a rails project I''m pitching over the proverbial tipping point at my company. The Situation: I''m the lead architect at a large bay area retailer. My team and I are currently suffering through the process of paying

Hi, I have created a small :restart task to overwrite the default one: task :restart, :roles => :app do sudo "/etc/init.d/lighttpd stop" sudo "/etc/init.d/lighttpd start" end This works fine and lighty does restart, but the last command never finishes, so I never return to the prompt. Here''s my output: cap restart loading configuration

Hi All I received a raw data set with one record per tennis player (both male and female) and then i cured it by aggregation i.e by 4 age groups, 2 gender levels and 6 income levels. Gender and Income are categorical variables. Please advise me how to use 'R' to model this data set (Actually, i want to know the right regression technique and steps to do that, including removing

Running into an interesting problem that at first glance appears to be a bug in the AR association code. However, it''s explicitly coded this way so I''m not so sure. I have some code like this: class Address < ActiveRecord::Base belongs_to :addressable, :polymorphic => true end class Person < ActiveRecord::Base has_many :addresses, :as => :addressable,

I am breaking ground on a new project and one of the issues I expect to encouter is the ability of users to define their own columns. For example, one of the features of this application will be the ability to store information about people''s skills and then search for and schedule them based on this information. Since every organization''s needs are different, it would be ideal

I have to objects with common functionalities and a lot of difference. So I want that each have his own table but inherit the common functionalities from a parent class. How can I do this in Rails ? -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to

I am designing an application to run a fishing tournament I am hosting. Each fish entered will be given a point total based on the length of the fish and the species of fish. Each species has a point multiplier. For Example Trout have a multiplier of 10 so a 20 inch Trout would have a score of 200. My conundrum is in where and when do I calculate the points. The options I have come up

I''m trying to deploy a rails app with no success. I can execute: ''rake remote_exec ACTION=setup'' but when I try to execute : ''rake deploy'' I got this error: loading configuration c:/ruby/lib/ruby/gems/1.8/gems/switchtower-0.10.0 /lib/switchtower/recipes/standard.rb loading configuration ./config/deploy.rb executing task deploy transaction: start

Hi, seem to keep running into a wall here. I can''t find any resources on site navigation that can deal with any model being in the nav, allow nesting, and can dynamically update. So I thought about it for a while, and decided on a MenuItems class, which contained the position of the child in relation to it''s siblings, where the parent and the child were polymorphic. Then a given

My app has an association that''s got me scratching my head. I have Users, and Images. A User has many Images. (Yes, another picture sharing app, but it''s for a small niche, and it doesn''t end in -r!) I would like to express a "Favorite" relationship between both Users to Users, and Users to Images. This seems like the opposite of the standard